Display screen or portion thereof with a sequential graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with a sequential graphical user interface showing a first image, according to our new design;

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

The broken line showing of a display screen with graphical user interface is included for the purpose of showing portions of the article which form no part of the claim.

The appearance of the transitional image sequentially transitions between the images shown in FIG. 1-3. The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with a sequential graphical user interface, as shown and described. 